Similarly, a mapping that describes the splitting of an addressfield into Line1, Line2, City, ZipCode would have one source column and four target columns.
类似地，如果一个映射描述的是将address字段分割为Line1, Line2, City, ZipCode，那么它将有一个源列和4个目标列。
2
The desc field contains the line number and the value contains the code address for the start of that source line.
desc字段包含行号，而value包含源代码行的起始部分的代码地址。
3
You can specify a user profile field to use as the source of the default email address when a user adds an alert.